This alert notifies you that cache offload in the MCDN parent cache tier dropped below a set threshold. This error is reported by a cluster.

You can set this alert to monitor one group.

Available for

• Aura Managed CDN

Notification time

• New Alert - The condition is present for 15 to 20 minutes.
• Alert Cleared - The condition is cleared for three to eight minutes.

Threshold configuration

You need to set:

• The minimal traffic volume delivered to a lower tier (in megabits per second) and the minimum percentage of cache offload in the parent cache tier necessary to trigger the alert.

• Whether the alert should be triggered when the threshold is reached for one of the selected clusters or all of them combined.

Troubleshooting

To troubleshoot this alert:

1. Log into Operator Portal.

2. Go to Monitor > Cache Performance.

3. Click the gear icon and select Area and POP (Points of Presence) of interest.

4. Click Submit.

5. Hover over a representative place on the graph and note the Traffic Edge Hit Ratio.

6. Click Monitor > Cluster Traffic.

7. For both graphs, Cluster Traffic and Cluster Offload, click the gear icon. For Clusters, select the clusters of interest.

8. On the graphs, hover over a representative place and note the values.